PREVIEW
... large number of survivors to make quick repairs outside.
The ice accumulated at the bottom is removed, leaving no steps for zombies to climb up.
The smooth wall and a layer of smooth ice floes left no place to climb.
But it was different inside the city. The ice had great plasticity, and people directly cut out steps to reach the top of the wall.
The ice is sprinkled with dust to prevent people from slipping while walking.
This ice wall is a characteristic ...
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